[Sync] Replace manual DI with SetTestingFactory.

components/sync/driver/fake_sync_service.cc

Index: components/sync/driver/fake_sync_service.cc
diff --git a/components/sync/driver/fake_sync_service.cc b/components/sync/driver/fake_sync_service.cc
index e0d00fd0caeafc0a267121ad14c7d2c2acc987bc..691d27ba027a11f20550faf78eb895989769cc1c 100644
--- a/components/sync/driver/fake_sync_service.cc
+++ b/components/sync/driver/fake_sync_service.cc
@@ -146,14 +146,6 @@ void FakeSyncService::RegisterDataTypeController(
 
 void FakeSyncService::ReenableDatatype(ModelType type) {}
 
-bool FakeSyncService::IsPassphraseRequired() const {
-  return false;
-}
-
-ModelTypeSet FakeSyncService::GetEncryptedDataTypes() const {
-  return ModelTypeSet();
-}
-
 FakeSyncService::SyncTokenStatus FakeSyncService::GetSyncTokenStatus() const {
   return FakeSyncService::SyncTokenStatus();
 }
@@ -218,4 +210,14 @@ SigninManagerBase* FakeSyncService::signin() const {
   return nullptr;
 }
 
+bool FakeSyncService::IsPassphraseRequired() const {
+  return false;
+}
+
+ModelTypeSet FakeSyncService::GetEncryptedDataTypes() const {
+  return ModelTypeSet();
+}
+
+void FakeSyncService::Shutdown() {}
+
 }  // namespace syncer